Anomalous magnetoresistance near the spin reorientation transition of dilute Gd-Y single crystals

被引：3
|
作者：
Santos, J. A. M.
Collingwood, J. F.
Sousa, J. B.
Palmer, S. B.
机构：
[1] Univ Porto, Dept Fis, IFIMUP, P-4169007 Oporto, Portugal
[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
rare-earth alloys; rare-earth magnetism; magnetoresistance; spin reorientation transition; phase transitions;
D O I：
10.1016/j.jmmm.2003.12.1297
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report very detailed measurements of the magnetoresistance (MR) in the vicinity (+/-5 K) of the spin reorientation temperature (T-SR) for pure Gd and Gd1-xYx single crystals with x = 0.025 and 0.075. The temperature dependence of the a-axis magnetoresistance in pure Gd is always negative in the temperature range studied. In the dilute Gd - Y samples the low-field MR changes from negative above T-SR to positive for T<T-SR, becoming again negative below some lower temperature T*, where another phase transition takes place. (C) 2004 Elsevier B. V. All rights reserved.
引用
收藏
页码：E491 / E492
页数：2
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